<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
		<style>
			*{
				padding: 0;
				margin: 0;
			}
			body{
				padding: 20px;
			}
			button{
				margin-right: 10px;
				margin-top: 20px;
			}
		</style>
	</head>
	<body>
		<h1>frame1</h1>
		<button>按钮1</button>
		<button>按钮2</button>
		<button>按钮3</button>
	</body>
</html>
